John Meaney has rich and vivid imagination. He's created an alternative universe where cities are powered by the bones of the dead. Wraiths exist inside cars, motorcycles, even lamps, and seem to be a de-facto for artificial intelligence. I was often caught out by a description that was strange not only to me, but was impressive or different for the main character. I never felt I had an understanding of the rules of this world, I know show don't tell, but there wasn't enough showing. Things were strange, people died, and sometimes they came back. There was also a police procedural and hunt for a cadre of killers, but that was the least interesting aspect of this book.